Material resembling leather



* NITED STATES PATENT OFFICE.

DAVID BEATIY, or BEminLEY, CALIFORNIA, Assrenon 'ro HIMSELF As rausrnn.

MATERIAL RESEMBLING LEATHER.

inseam.

N0 Drawing.

I '0 all whom it may concern Be it known that I, DAVID BEATTY, a citizen of the United States, residing at Berkeley, in" the county of Alameda and State of California, have invented new and useful Improvements in Material Resembling Leather, of which the following is a specification.

In making my improved process material I prepare or procure viscose, which, as is well known, is obtained by treating ordinary cellulose with caustic soda, bisulfid of carbon, and water. I may then purify the viscose, by which is meant the extraction of the sulfur salts. I immerse in an aqueous solution of sodium chlorid or may defer the purification, as hereinafter described, to the end of the process. I take a quantity of viscose thus obtained from 100 parts of cellulose and mix it with from 12; to 50 parts of suitable fiber, cows, hair being preferred, as being strong and thin and not noticeable on the surface when the product is reduced to a finished condition. I-then add as 'a preservative, 6 parts, more or less, of a tanning agent, such as oak bark. To this I add a substance which will render the product pliable and moisture-resistant, such as a well boiled mixture of 2 parts of pure crude rubber, 5 parts of resin and 5 parts of oil, preferably linseed oil, which dries on the surface, but, in the, interior, being preserved from oxidization, retains its adhesive properties indefinitely. The quantity of this mixture added is not so great as to prevent the transpiration of moisture from the feet when used as a sole leather. The Whole mixture is then rolled into a sheet or shaped into any form desired.

I then produce coagulation of the mixture either by allowing it to stand for a sufficient length of time or by heating it'or I effect simultaneous coagulation and purification by immersion in a bath of chlorid of sodium,

which dissolves the sulfur salts in the viscose while not dissolving the viscose itself.

Chlorid of ammonium also'may be used to In this case the proportions of the bath 5pecification of Letters Patent. Patented J 11 28, 1921,

Application filed October 8, 1917. Serial No. 195,441. I

would be 10 pounds of chlorid of sodium,

100 pounds of Water and as much chlorid of ammonium as there was caustic soda used in making the viscose.

I then permit the mixture to dry, rolling 2. A leather substitute consisting of purified coagulated moisture-resistant viscose containing fiber therein. 1 i

3. A leather substitute comprising dry, coagulated, tanned viscose containing fiber therein.

4. A leather substitute comprising dry,

coagula ted, purified, tanned viscose containing fiber therein.

5.,JA leather substitute comprising purified, coagulated, tanned viscose containing fiber therein. I u

6. A leather substitute comprising dry, coagulated viscose vcontaining cows hair therein. I

7. A leather substitute comprising coagulated, pliable and moisture-resistant viscose.

8. A leather substitute consisting ofpurified coagulatedmoisture-resistant viscose.

9. A leather substitute comprising dry, coagulated; tanned viscose.

10. A leathersubstitute comprising dry, coagulated, purified, tanned viscose. I 11. A leather substitute comprising purl fied, coagulated, tanned viscose.

. 12. A' leather-like material comprising tanned, coagulated viscose having fiber incorporated therein.

13. A leather-like material comprising softened, coagulated viscose having fiber'incorporated therein.

14. A moisture-resistant coagulated viscose having fiber incorporated therein.

DAVID BEATTY.

leather-like material comprising. 

